code: def test_given_one_password_in_pwd_file_expect_one_credentials_entry(
      self,
  ):
      self._set_file(
          self.config_file.name,
          "[TabPy]\n" f"TABPY_PWD_FILE = {self.pwd_file.name}",
      )
  
      login = "user_name_123"
      pwd = "someting@something_else"
      self._set_file(
          self.pwd_file.name, "# passwords\n" "\n" f"{login} {pwd}"
      )
  
      app = TabPyApp(self.config_file.name)
  
      self.assertEqual(len(app.credentials), 1)
      self.assertIn(login, app.credentials)
      self.assertEqual(app.credentials[login], pwd)
  
file_path: TabPy/tests/unit/server_tests/test_pwd_file.py
imports: import os
  import unittest
  from tempfile import NamedTemporaryFile
  from tabpy.tabpy_server.app.app import TabPyApp
label_desc: Use image node_id 7 for calling the TestPasswordFile obj's underlying member method code with example usage: obj.test_given_one_password_in_pwd_file_expect_one_credentials_entry() without return types